Tool for pulling gears, etc., from their shafts



Patented June 5, '1923.

" UNITED stares.

. j Les?, f

e 'raar asics.:-

ALFRED a. JOHNsOn, or CHICO, CALIFORNIA;-

-fOOL FOR PULLING GEABS,

ETC., rnonfrnnm snAFTs.

. y Appncatiun med February 1o, 1921. serial No. 444,020.

VTo all whom if 'may concern lle it known that I. Amann A. Jonsson, a citizen ot' t-he United States` and a yresldent of the city ot' Chico. county of Butte, State of California, have made a new and useful lnvention-to wit. Improvements 1n rlools `for Pulling Gears, Etc., from Their Shafts;

The principal objectof invention is to provide an improved tool or device tor'lnoving or separating pulleys, wheels, gears and the like from shafts or pintles to which they gear puller and 4is sure tool with leverage means strong enough i embodied.

lvantage is insufficient.

might be attached. A further object of my invention is to provide an `appliance that may be readily `placed into or out of operative position' relative to the parts on which it is to operate, and thatl may be easily transported and veconomically manufactured. Other objects and advantages will appear as thisdcription progresses.

In this speciication andl drawings, the invention is illustrated in the form considered to' be the best. but it is to be understood tha-t the invention is not limifted to`suc-h form, because it may be ernbodied in other forms, Iand it is also to be understood that in and by the claims following the description', itis desired to cover the invention in whatsoever form it may be This invention is known primarily as a used for the purpose of drawing 'pulleys` wheels` cams or other parts from fa shaft or bar and which fit so snugly or tightly as to resist removal by any of the ordinary methods. As a usual matter. the removal of an article from its semi-perma-- nent position necessitates the use of a vpresto overcome the friction holding the said article in place. The usualmethod of having but one threaded shaft is objectionable in that the thread may be stripped o1- if a coarser thread used` the mechanical adl The accompanying specification re-ters to an improved appliance `that is intended` to overcome all ot thc objectionahle' features found in the present type of gear puller.

the accompanying one-sheet'of drawings,

the annexed -ber of slotted portions to the quantity shown for it would be clearly within'thefpurview ot this invention to rearrange; the positions of the slotted members 'relative to the axis of. the body portion 1, to increaseor lessen the number thereof. The slotted portions 2, 3 and et arefformed integrally witnthe body member 1 and have arms 5, 6 and 7 varranged thereon by passing suitable" pivot pins 8, 9 and 10 through suitableopenings provided Vin' the portions 2, .3 and 4c `and in the ends of the said arms.A The opposite endsot the arms are either formed hook-shape or in any other desirable contour best `suitable for the purpose to which the appliance 'is used.

The body portion 1 is drilled concentrically *andl threaded'4 to permit-the interiorly and exteriorly threaded sleeve 1-1 being placed into engagement therewith. The sleevell yis provided with a squared por tion 12 on an end thereof to alord'a grip to a wrench or other turning device. In the practice of this Ainvention, theexteriorly threaded portion ofthe sleeve 11 .would be provided with threads ot a standard of substantially five to the inch. The interior porvtion-of the sleeve 11 would ie threaded with do not wish to limit myself to the sizes i shown as it would he clearly Within the purvview of this invention to vary the respective thread pitches so long as the ratio between the lsame would be maintained. A central .threaded shaft 14 is adapted to be placed into engagement with theinteriorly thread' yed portion `ing provided with a tapered point on the end of the sleeve 11. the shaft 14 bethere'or` for centering pur ses and the opposite end 16 squared' or ot erwise formed for wrench engagement.

Assuming' that a gear, wheel or .other article 17 were tobe removed from a shaft of hay 18, the part 17 ordinarily being with threads of and in much quicker timel rality of slots-therein ,hooked members 'ari movable relative to the remaining part 18, the shaft 14 of the tool would irstbe placed against the'riend'of the""fshaft 18 and the clamping. arms 5, 6 and 7 into with the part 17 to be removed. 1n this po-` sition the operator would move the shaft 14 so as to 1 gradually increase the gripping tension of theV arms 5, 6 and 7 on the article 17,. If the gea-r 17-had become rusted and very securely held to the shaft 18, the operator would rotate the sleeve 12 for the reason thatowing` to the differential relation existing 'between the shaft 14 and sleeve 11 diierent pitches, a far eater mechanical advantage is obtained. Afterv the gear 17 looened, theeoperator would discontinue rotating the sleeve 11 and apply the rotative.

movement to the shaft 14 and through the single threadsthereof 'would obtain a faster' movementof the movable element 'relative to the stationary part. The arrangement of 'the ad`usting screws withstandard threads of di erent` itch permits a -more efficient leverage wor ing' force to be obtained. thus accomplishing greater resultsfwith less llabor describe i invention,

. Se v. what I claim'and desire to. aejcure'by Letters Patent is:

1. A deviceV of y the character v'described comprising affbody member'having a plu? ranged in said slots; a A ,tllgijeded .member-ad# justably positioned [itx-said body member engagement y becomes sufficiently having the' opposite endsftheneof and movable axially relative thereto for imparting axial" movement -to said hooked members 'and an auxiliary threaded member mounted `Within said.- first mentioned threaded member and tive theretofor imprting axial movement to saidfbody member; 'l

2. A device of the character described lcomprisin abody member having` a pluranged in said slots; and (plural threaded means mounted within. sai body member and movable axially relative thereto at different rates of speed' for imparting an axial movement to said hooked members.-

3. An smpliancel such as described for moving one element relative to another comprising a member provided with/elongated openings .therein and having a plural vralityv of s ots therein; hooked members arthreaded means mounted within said Ybody member, each pf said threaded means beingv movable axially relative to the body' mem-- ber and to each other'at dier'ent rates of ,i speed, and one of. said threaded means en/ gaging one, of said elements and mounted in, s/aid elongated openings arild adapted to engage 'the other ofsaid. elements.

In testimon whereof, Ihavehereunto set my hand at hico, California, this of January, 1921,.`

ALijaEp .iaiaoHNsom Inpresence of" H. K. SEARS,

movable axially rela; .x40

arms

31 day 65 v 

